Machine for turning down and folding the ends of box covers



G. nu-cARr Filed lay 31. 1927 heets-Sheet 1 Jun e 17, 1930.

MACHINE Fon TURNING DQwN AND FOLDING THE IzNvs ovox covERs G. DucAR-r 1,764,247

MACHINE FOR TURNING -DOWN AND FOLDING THE ENDS 0F'l BOX COVERS l June 17,A 1930.

Filed May 251,A 1927 5 Sheets-Sheet 2 June 17, 1930. G. DucAR-r 1,764,247

MACHINE FOR TURNINGv DOWN AND FOLDING THE ENDS 0F BOX COVERS Filed mayl :51, 1927 5 sheets-sheet 5 June 17, 1930. G, nuAR-iv 1,764,247

MACHINE FOR TURNING DOWN AND FOLDING THE ENDS OF BOX COVERS June 17, 1930. G. lDuczART 1,764,247

`MACHINE FOR TRNING DOWN AND FOLDING THE ENDS .0F BOX COVERS A Filed may :51. 1927 @sheets-sneek 5 I/Ar veA/Taf Patented June 17, 1930 UNITED STATES PATENT oFFlcE GUILLAUME DUCART, IF PARIS, FRANCE FOR TURNING DOWN AN D FOLDING THE ENDS 0F BOX COVERS i Application filed May 81, 1927, Serial No. 195,521, and` in France .Tune 4, 1926.

It is known that cylindrical boxes which are referably made .of tinned sheet iron, card oard, etc., for containing pharmaceutical products, cocoa, tea, etc., are generally wrapped in paper, or other suitable material and that in order to effect this the operation is generally commenced by wrappin the box, by hand or mechanically, in a tu ular covering orwrapping extending beyond the parts or ends being then turned down and folded upon the bottom and the top or lid of the box.

The present invention relates to this second stage of operation or finishing stage and has for its subject a machine for folding the ends of the box covers or wrappers, turning down the folds formed upon the corresponding parts of the box, base or cover, and smoothing this down thus giving a very neat appearance and a perfecthold.. This machine vis more particularly characterized b the simplicity of construction of the mem ers forming a part of it and the method of producing the various movements of the said members, .by its robust construction and by itsA simple and sure operation.

It is hereinafter described in detail with reference to th'e accompanying drawing which illustrates diagrammatically one form of the invention given by way of example. In these drawings: v Y

Fig. 1 is a vertical axial section through thegeneral arrangement of the machine.

Fig. 2 is a top plan view showing Kone half of the machine.

Fig. 3 is'a similar view 'ofone half of the xed supporting plat Fig. 4 is a similar groove of the movable actuating disc.

Fig. 5 is a front elevation of a blade carrier. F i g. 6 is 'an end view thereof. Fig. 'E' is a pll'an view thereof.l Y Fig. 8 is a ont elevation of a detail-of the machine.

Fig. 9 is a sectional view line .fa-:v in Fig., 8.

Fig. 10 is a top plan view of the detail vshown in Fig. 8. Y Fig. 11 is a front elevation of a cylindrical taken along the top and bottom of the box, the projecting box which has been enclosed in a wrap ing before the ends offthe tubular wrapping have been turned down. v

Fi 12 is a diagrammatic plan view showing t e position of the plates before the machine enters into operation.

Fig. 13 is a similar view after the formation of the folds uponthe end of the wrapping.

Fig. 14 is a similar view after theffolds have been laid down by the blades, and

Fig. 15 is a similar view showing the folding of the box terminated, the blades being retainedbackward but not yet raised as shown in Fig. 12.

AReferring now, more particularly to-the drawings there is provided an annular supporting disc 1, the attaching extended. portion 2 of which is fixed to a plate, wall or other supporting part 3. The said disc 1 is provided with radial grooves or mortices 4. AI4 movable annular disc 5 is lodged ina recess 30 in the disc 1 underneath the latter and is movable by an operating lever 6. The disc 5 n n l n -1s provided w1th curved grooves or mortices 7*.

7 of suitable inclination to the radii of thedisc the function of which in vconnection with the radial slots yin the disc 1 will be more specifically described hereinafter.

There is also provided a plurality of blade carriers each of which is formed of a carriagel 8 to which is secured at the lower end thereof a threaded rod `31 on which is mounted a roller' 9. This roller engages in one of fthe t curved mortices 7 of the movable disc 5 85 bei held against the side of a plate 10 by the t readed' rod 31'which latter is anchored in the plate 10. This plate 10 bears against the underside of the disc 1 and also against the radial mortices formed therein.l The ca rriage 8 slides infthe upper part of the said mortice 4 of the disc 1. The movable disk 5 is maintained in posltion by the rollers 9 each of which rotates freel on the end of a threaded rod 31 screwed in a ore of the carriage 8. When the disk 5 l is turned, its curvilinear grooves 7 are d1s t placed at the same time while the rectilinear grooves 4 of the plate remain fixed so thatthe rollers 9 and the carriages 8 must necessarily be di laced. The lever 6'is fixed to the movi able sk through the mediumof a bolt 32;

the end of the said lever 6 being moreover Afixed disk 1. A block 37 is inserted between the lever 6 and the disk 5 on the ri ht where they are made integral by the bo t 32.

The lever 6 is thus completely outside the casing 23 which presents an opening for rmittin theY free displacement of the bloc 37 when t e lever 6 is turned in either direction. To the u per part of each carriage -8 is mounted a lade carrying shaft 12 adapted the. carriages occupy to turn in the said carriage and at one end of which is mounted a lmife or blade 13 of suitable shape) the other end comprisinga linger 14 held y a s`et screw 15 for example, a washer 16 being mounted if desired upon the shaft of the blade carrier 12 against the carriage 8.

The lingers 14 are disposed in planes perpendicular to that of its correspondin blade 13so that the `vertical` positnlon of e'said fingers corriponds to a horizontal sition of the blades 13 and vice versa. Upon the plate 1 are mounted plates 17 curve in the form of aL proximately a quarter of a circle to allow or the passage. of the carriages 8, each of these plates comprising, upon its convex part four mortices or, grooves of which two 18 and 19 are straight fon the forward movement and recoil omthe lade carrier and two are helicoidal 20 and 21 to produce the turning down and release of the blade inwhich engages the end of the finger 14 of theblade carryin shaft 12, a bridge 22 serving for holding t e central part c om- -prised at `the interior of the grooves in the plate 17.

The whole of the mechanism controlling the blade carriers, thus constructed, may be protected by a casing 23 open at the central portion to permit the introduction of the box 24. s The latter, surrounded by its cover 25 the ends of which project beyond the ends of -the box, is (disposed upon a su port 26, at-

tached to the end of a rod 27 an actuated in a known manner, for example by means of a pedal permitting the su port 26 to be made to rise m order to allow (Se boxes to be placed or removed. The operation of these blade carriers obtained by means of the above de scribed mechanism 'and with a view to efecte ing the work described hereinafter in detail is as follows: l

If the movable disc 5 is turned in the direction of the arrow a' (Figs. 2 4) by means of the operating lever 6 the pins 9 of at this moment their end position, shown dotted at 9 JFi .l 2

on account of the fact, on the one han ,of

the guiding ofthe carriagesb the radial grooves in the fixed late 1, an `of the fact, on the other hand, o the en agementof the pins 9 in the curved grooves g in the movable disc 5, the displacement of which tends to make the said pins advance towards the centre, the carriages 8 progressing towards the centre b sliding in the radial grooves 4.

During t e first sta e of this forwiard4 movement, the pins 14 o the blade-carrying shafts 12 being engaged in the stra ht lower grooves 19 of the blades 17, the bla es 13 remain in the' raised position, the pins being then horizontal; then during a second stage the engagement of the pins 14 in the helical grooves 20 produces the rotation of the shafts 12 and consequently blades 13 as shown in Fig. 2, since the pins 14 and the blades 13 are constantly in planes the lowering of the perpendicular to each other, these two stages Y in the forward movement of the knives correspending respectively to the formation and turning down of the folds, the pins 9 ofthe` 'tion 9".

carriages 8 then occup the If the movable disc 5 is t en givena movement of rotation in the opposite direction to the arrow a, it will be understood that, on the contrary, the' carriages 8 move towards the peripherly along the radial grooves 4. By the engagement of the pins 14 in the straight upper grooves 13 in a first stage of the the turned down position,

recoil, remain in that is to say ilat,

and thus smooth down the folds formed, al

second stage corresponding1L to the displacement of the ins 14in the elical grooves 21 18 and the blades producin t e return of the blades v13 into the raise position.v

The formation of the folds, shown dia-A los,

grammatically in Figs. 11 and 15, takes place as a result of the methods of operation described above. The box 24 being surrounded with a tubular wrappin 25, the ends b and b of which extend beyon the ends of the box (Fig. 11), is disposed upon the support 26 of the machine, the raised blades 131, 13z

13s then occupying the position shown in' Fig. 12.. .e

When the movable disc 5 1sturned inthe direction of the arrow a the blades 13 by advancing, in the raised position, define in the end b ofthe wrapping, portions b1, b? bs between two adjacent b ades, the said blades producing respectively edges or lines c1, c', each blade undulations d1, div

d. of the portions b1, bk, b

The blades 13 are then turned down during the' second stage of advance of the carriages 8 and the-undulations d1 d', d, are each turned down around the lines of folding c1 c, around whichv the blades pivot, each of the undulations d1 d. being thus clear -radial folded" c, and also near taken between two consecutive blades and i formin folds d'1, d', d'8, the undulations 1, for example, turned down around the line 01 being supported b the blade 13 and pressed by the blade v13" Fig. 14) The blades 13, remaining in the turned down position during the first part of the return movement, smooth the surfaces of the dii'erent folds d'1 d, (Fig. 5) `the effect of which is to make the folds very neat and give then a better hold.

It is clear17 understood that it is possible A without going outside the sco e of the invention, to9 make modifications an improvements in details; 'it is possible for example to combine With the machine an device of known type, the function of whic is to gum a label or the like upon the folds formed; in the same *way the use of mechanical equivalent means maybe envisaged.

. What I claim is:

^ 1. A machine for turning down and folding the ends of wrappers for containers comprls'ing a frame having a central circular opening, movable blades mounted on said frame, in equiangular relation to said opening, means to move the blades radially of said opening to form folds in said wrapper and means to rotate saidblades a partial revolution to smooth down the folds formed in the wrapper against the end of the container, said means for advancing said blades also being operable in an opposite direction to withdraw said blades.

2. A machine as claimed in claim 1 in which the frame comprises affixed plate havi a. central o ening and provided with ra ial slots, bla e carriers mounted to move in said slots, and means to rotate said blades at the GUILLAUME ART. 

